JohnSnowwasafamousdoctorinLondon-soexpertthatheattend...

问题详情：

   John Snow was a famous doctor in London - so expert that he attended Queen Victoria as her personal physician. But he became inspired when he thought about helping ordinary people   61  (expose) to cholera,   62   was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died whenever there was   63  outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never   64   (control) until its cause was found.

   He became interested in two theories that   65   (possible) explained how cholera killed people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease  66   their bodies with their meals. From the stomach the disease quickly attacked the body and soon the   67   (affect) people died. He suspected the second theory was correct   68   he needed evidence.

So when another outbreak hit London in 1854, he was ready to begin his   69   (enquire). As the disease spread quickly through poor neighborhoods, he began to gather information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He determined   70   (find) out why.

【回答】

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